Sealing ring



Aug. 24, 1937.

c. w. HALL SEALING RING Filed April 7, 1956 2 I L m www 1N VENTQR.

ATTORNEY.

Patented Aug. 24, 1937 2,090,627 same we Hall, Denver, 0010., assignor' to The Charles W.

Hall Rotary ValveMotor 100., Denver, Colo. Application April 7, 1936, Serial No. 13,961,

s calm.

This invention relates valves for internal combustion engines, and relatw more particular. to meansfor sealing said valves against the escape of gases and to the lubrication of such valves. c

The invention is particularly designed to seal valves of the type illustrated in applicant's Patv ent No. 1,996,200; and while particularly eflicaciouswith this particular type of valve, it is of course, notlimited to this particular. use. 7

The principal object of this invention is to provide a sealing ring for the ports of a rotary.

valve which will have a longitudinal expansion so as to continuously maintain itself (tight against saidvalve and so that all sealing surfaces willbe of relatively large area and automatically held in sealing contact. g

A further object is to so construct the rin that pressure of the gases sealed against will asa sist the ring in maintaining the seal.

Otherobiects and'advantages reside in the detaliconstruction of theinvention, which is de: signed for simplicity, economy, and; efficiency. These -will become more apparentvfromthe folg lowihgdescription. 7

j In thefollowing detailed description of the inventionreference is had to the accompanying drawing which forms a part hereof. Like numerals refer to like parts inall views of the drawing andthroughoutthe description. I i

In the drawing; g I I Fig. -1 is a vertical section through a rotary valve,v of the type illustrated in applicant's Patent No. 1,996,200, illustrating the improved, sealin ring and lubricator in place on the valve.

Fig. 2 is a plan view of the solid ring portion of the sealing ring. i

Fig. 8 is a side elevation thereof, partly in section. v Fig. 4 is a similar plan viewof the middle expansion ring of the sealing ring.

. Fig; 5 is a combined side elevation and section thereof. a

Fig. 6 is a plan view of the inner expansion ring of the sealing ring.

Fig. 'l is a side elevation and section thereof.

In Fig. l, typicalparts ofya rotary valve engine are illustrated for the purposeofshowing the, application of the sealing ring and lubricator of this invention. These parts are designated by numerals as follows: cylinder block l0, rotary valve ll, cylinder l2, cylinder head I3, cylinder port it, intake port I 5, exhaust port It, exhaust valve passage l'l, intake valve passage l8, spark 55. plug opening it, and valve thrust bearing 20 .shown in Fig. 3.

(CL Rib-80)v Briefly, the valve H is rotated in any suitable manner, and alternately places the intake passage i 8 between the ports I and I5, and the exhaust pasage i1 between the ports I and I3.

. It has been exceedingly diilicult to seal the passages I I and It to the port l4, so as to prevent the exhaust gases from leaking to the intake passage l8 and loss of compression from the cylinder l2 about the valve II. This invention conthe escape of gas at this point.

" templates a novel sealing ring for sealing against 'The sealing ring consists of anouter solidrlng 2 I having an inner bevelled sealing face 22. The inner face is conical, and is positioned substantially at 45 to the axis of the ring. This produces right-isosceles, triangular ring'section, as P v A conical, split middle ring zs'is positioned" :within the ring 2!. The ring 23 is wedge-shaped in cross section, having an outer surface 24 of the proper angle toflt against the inner surface 22 of the ring 2l', anda bevelled inner surface 25 forming a conical seat within the ring 23 An expansible inner ring 26 is positioned within'the ring 23. The ring 26has a bevelled outer surface 2l'of theproper angle to fit snugly againstthe inner surface 25 of the ring 23.-,' The innersurface of the ring, shown at 28, is cylin-v drical about the axis of the completering. The

. two inner rings 23-and. 25 maybe pinned tog gether to maintain their splits in staggered relation by means of a pin 38 andpin hole 39 as is usual in sealing ring practice, a

The apex edges of the rings 23 and2l'are slightly compressed when in working position within the ring 2'l.- The complete, assembled sealing ring is fitted into a suitable counter-bore 29 about the cylinder port It.

It can'bereadily seen that the inherent expancontacting surfaces against the passage of gas,

but also acts to force the ring 2| upwardly against 'the bottom face of the valve Ii and similarly forces the bottom faces of the rings 23 and 23 against the bottom of the counter-bore 23. above,

below-orthrough the sealing ring. A similar use of the ring may be made at the top of the valve II, as shown at 30.

The lubricating portion of the device comprises in a rotary button 3| which is constantly forced against the bottom of the valve II by means of a compression sprins 82'. The button II is seated inacylindrlcal concavity flintlncylinderhead l3, and is constanfli supplied with oil ,irorn an oil supply conduit 34. It is preferred to provide an oil discharge conduit 35 so that a constant circulationoioills providedthroushthe concavity. Thisoil feedsupwardlythroushaport flinthebuttontoluhrlcateth'etopofthehutton 3| anigthrodg'h'it, lubricate the bottornz otthe valve IL The button rotates asthe valve ll rotates. due to its M radial contact therewith. To prevent excess oiltrom escaping around the periphery of the button II. a

ringfil is provided completely surrounding the sbinedtoactasainst'theooniea'ltaceotsaidouter' to inerease the axial width of the entire It ts desired to call attention to the laet that is not only accomplished bythe inherent expansibillty o! the split rings 13 and 2. This sealing is also facilitated by the internal pressure-oi the gases within the ring. This pressure acts aaatnstjtheinn er face I! of the ring in; the principle involved.

detail construction of the invention, which is face:

litoassl'stintheexpandinsaetionotthecompleteassemhly. j Twooithe innersplit rings havebeeniound most satisfactory. 'It is conceivable hofwever, that more than two could'be used without alter- Other objects and advantages raide' in the ded'gned forsimplicity. economy. and emciency.

These will become more apparenttrom the'lol- Having thus described the lnventiom what is clalmedanddesiredsecuredbylettershtentis: '1. A sealing rinsiorrotary valve engines-comprisinsb an outersolidringhavlngaconicalinner expandingv a split ringv said conical inner face; said split ring provldinza second co'nicalinner face; andathird conical split ring eapandinzagainst said second oonieal innerlaee, expansionolsald sp i ri ss ml o incre se H th'e axialwidthoi theentire 2. Asealing rm: :0: rotary isosceles trlangularcros section, its outer face being at right angles td'm and its inner said intermediate ring having an face bevelled to correspond to the'inner bevelon said ,solidrinsandanlnnerhoeoilesserbevel;and-

s ..)1-".0ll

assembly axplnrality 0! split operating wlth f M 'inneriaoeolsald'soildrmlzsaidoolnpdterims valve 'prlsingz an outer solidrln havinra right sninnerringhavinganoutertacecorrespondina ments having interensasins taeesnested with :tbeirhasesinaeornmonplaneandthelrapiees converging to a common point. whereby the eapansion of the separate suit rim elements is com- 4."Ase aling"rhntorrotaryvalveen inescomprisinzpanoutersolidmhavinsarlghtisosceia triangular exp-section. its outertace bevelled inneriace otnldouter rim: saidthseilneal expansion of the oili-v binedlnaioroeaetinsasahist dieeoniealmu faceotsaldsolidlnnerrinatoinuhntlnaahl wldtb oitheentirealunhb. y 

